Improvement in propellers



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AARON COLTON, 0F SYCAMORE, ILLINOIS.

Letters Patent No. 99,063, dated January 25, 1870; lmtedated Jannary 12, 1870.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

Be it known that I, AARON G01/ron', of Sycamore, in the county of De Kalb, and State of Illinois, have invented an Improvement in Propellers for Boats; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the artto make and use the same, reference being had to the accompanying drawings, and letters marked thereon, making a part of this description, in which- Figure 1 is a perspective representation of the aft of a boat, with my propeller in position for use.

AFigure 2, a view of the stern of a boat, showing, also, the propelling-devices. ,A

Figure 3, a view of the under `side of the same.

Figure 4,a perspective representation of the devices for reversing the paddles, detached from the boat.

Figure 5, an enlarged representation of one ot' the paddles and framesgemoved from the guides.

Figure 6, an elevationl of a part of the spring-de-- vice for bringing the paddle-blade vertically into the water, preparatory to making a stroke.

Figure 7, a view ot' the under side of the same.

The present invention relates to an improvement in that class of propellers which have paddles arranged to operate under the stem of the boat or vessel, and have a reciprocating motion longitudinally with its keel; and

Its nature consists in the use of two or more twepart paddles, which areal-ranged to be raised or lowered in a substantial frame, when they are being reversed, by means of cam-rods, which are placed over the paddle-guides, and operated by means of connecting-rods and a post, the latter extending-into the boat, and having a lever attached to its top, for accomplishing this purpose; and in so forming the cam-rods, that when the paddles have been reversed, the rods will be lturned back automatically, at the rststroke of the paddle, and thus prevent accident-s and obviate nnneccssary attention on the part of the engineer; and in the use of a spring-device, which is fastened to the boat, and used to bring the paddles into avertical position, preparatory to making a stroke, the whole operating, with other mechanism, as hereinafter fully described.

A represents the aft part of an ordinary boa-t, which may have any suitable form most convenient, only so .that its under side has a suitable recess, for the convenience of operating the paddles above its keel or bottom.

I, rigs. 1, 2, and 3, represents guides, (which are held in place by depending supports, e, fig. 2, extending the'length of stroke, and being fastened t0 the bottom of the boat,) and which have ordinary grooves.

formed in their edges, for the ends of cross-trees M, to slide in, in the usnal manner.

These cross-trees M, and the elliptical ends Y Y, I

figs. 2, 3, and 5, provide frames, `to which two-part paddles, K L, are hung at their upper edges by pivots l, tig. 5, slots XV being made through the ends Y, to receive lugs Z, which are attached to bars X, and used to hold the paddles in position when making a stroke.

Loops or guides b, are attached to the ontsides of the ends Y, and holes are made through the cross-trees M, near the ends, to provide guides for the bars X to slide in when the paddles K L are being reversed.

Cam-rods G, figs. 1 and 4, are arranged to' turn onefourth roun'd the bearings lr, attached to the guides l, and they are so curved at II H, that when the curved parts are turned up, they will raise the bars X X, by4

means of projecting higs n. n, figs. 2 and 5, and bring,- the lugs or stops Z, projecting through the slots IV, opposite to correspondingnotches in the ends of the paddles K L. t

'Ihis operation will permit the paddles to swing to the other sides of the lugs or stops'Z, and consequently place them in position to makereverse strokes. Now, to prevent the paddles from reversing at their lirst backward movement7 cams Y are rigidly fastened to the rods G, as seen at fig. 4, and are so arranged that the lugs In n, on the bars X, will strike against them, and turn the curved parts H 11,011 the rods G, flat nponthe guide I, and thus allow the paddles to remain in their reversed position.

.The devices for turning the curved parts H 1I, of the rods G, upward, consist of a post, C, figs. 1, 2, and 4, which has a vertical bearing in the frame ofthe boat A, and also, a bearing in a strap or support, B, which is fastened to the boat, and it supports, at, its lower end, a lever, E, to which connecting-rods F are fastened, the outer ends of the rods heilig fastened to elbows t, iig. 4, which are formed on. the inner ends of' the rods G.

It will be seen, from this description, that if the post C be turned, by means of a lever, D, attached to its top, the rods G will be turned in their respective bearings 1r, on the guides I, and consequently turn the curved parts H H, up or do\vn,-as the case may be.

The device for placing the paddles inposition for a stroke,consists oi a latch, lt lmy 2, figs. 3, (i, and 7, which is hinged to a loop, g, attached to the boat A.

When the paddle is drawn back, the catch 2 is forced, by the spring j, into a notch, 3, made between theconnecting-rod N and the cross-tree M, fig. 3, and thus brings the end lt against the side of the paddle K, as shown at fig. 6, and turns it from a horizontal position to a vertical one, preparatory to its making a.

stroke, the spring f readily permitting the connectingrod N to pass over the catch 2, and the paddles opening and closing, similarly to a valve, when in operation.

By referring to tig. 1, it will be seen that the connecting-rods N pass through the offset in the boat, and that they are operated. by rods P, and acrank, Q, the latter heilig so constructed and operated, as to move the paddles K Lalternately back and forth, to give a continuous motion to the boat A.

Having thus fully described my invention,

What I claim, and desire to secure by `Letters Patent of the United States, is-

1. The two-part paddles K L, in combination with the cross-,trees M, ends Y, bars X, and guides I, constructed and arranged to operate as and for the pur- 0 pose specified.

the purpose specified.

AARON OOLTON.

XVit-nesses:

J. P. BURCHELL, W. A. STEWART. 

